Bank Nifty Index: Expiry and Contract Basics

What Bank Nifty Actually Is

Bank Nifty, officially the Nifty Bank index, tracks a basket of banking shares. Its options have monthly and quarterly expiry, on the last Tuesday of the expiry period with a holiday adjustment. Weekly options are discontinued. For lot size, use NSE’s latest contract file for the selected expiry; example quantities below are assumptions.

An index combines its constituent prices under its methodology. Constituent weights and derivative contract quantities are different concepts: a bank’s index weight does not determine the number of units in a futures or option contract.

Bank-sector exposure can respond to earnings, credit conditions, interest rates and broader markets. The direction and size of an index move remain uncertain.

Checking Constituents and Weights

Use a dated NSE Indices constituent list and factsheet for the current basket. Do not treat a fixed old count or rounded example weights as present-day data.

For concentration risk, check each weight and the combined exposure to the largest banks using the same factsheet date.

Why a fixed count or weight goes out of date

The Nifty Bank index began on a base date of 1 January 2000 with a base value of 1000, and it uses free-float market capitalisation weighting. NSE's factsheet dated 31 October 2024 said the index has a maximum of 12 companies, and it listed HDFC Bank at 28.71% and ICICI Bank at 24.65%. An Angel One market report dated 10 August 2026 said the index has up to 14 companies and put HDFC Bank at 18.20%. We could not reconcile these figures from official pages on the day we checked.

The lesson is practical. Any article, including this one, can be out of date on the count and the weights. Open the latest factsheet, write its date next to the numbers in your notes, and re-check at each semi-annual review. A drop in one large bank matters much more when its weight is 28% than when it is 18%.

Lot Size, Notional Value and Tick Math

Use the exchange’s latest contract file for the applicable expiry quantity. NSE can revise lots across different contract periods, so an old table is not a substitute for the selected contract.

Illustrative futures quantity: assume 30 units and a futures price of 56,000. Notional exposure, the full contract value, is ₹16,80,000. Each futures-price point changes gross value by ₹30, so 100 points is ₹3,000 and 500 points ₹15,000. These are assumed inputs, not a live quantity or quote.

• Multiply futures price by total units for notional exposure.
• Multiply the actual futures-price change by total units for gross profit or loss.
• Check current margin separately; it is not the same as notional or maximum loss.

Rupee value of an index move for one lot

The Bank Nifty lot is 30 units in the contract data this site follows (NSE lot file, Oct/Nov 2026 contracts). So each index point on a future is worth 30 × ₹1 = ₹30 on one lot. For an option, each ₹1 change in premium is also ₹30 on one lot. Lot sizes change, so check the NSE file for the contract you trade before using these numbers.

Bank Nifty and Nifty: comparing the same 1% move

Nifty has a lot of 65 and Bank Nifty has 30. The index levels also differ. Assume, as an example, Nifty at 25,000 and Bank Nifty at 56,000. A 1% move is 250 points on Nifty and 560 points on Bank Nifty. On one lot, that is 250 × 65 = ₹16,250 for Nifty and 560 × 30 = ₹16,800 for Bank Nifty. The rupee effect of a 1% move is close, though the point counts look very different. This is why comparing point moves across the two indices misleads. Compare percentages and rupees.

Which index moves more in a given week is a matter of the data for that week, and no claim is made here. See Nifty vs Bank Nifty for a longer comparison.

Worked Example: A Bank Nifty Futures Long Trade

Made-up long futures trade: assume entry 56,000, exit 56,400 and total quantity 30 units. Opening notional is ₹16,80,000; no current margin estimate is claimed.

The futures-price gain is 400 points and gross profit ₹12,000. Sale notional is ₹16,92,000. At 0.05% sell-side STT, effective 1 April 2026, STT is ₹846 before other charges.

If the same assumed futures entry instead exits at 55,600, the gross loss is ₹12,000. Costs increase that loss. Profit less STT alone is not a net-profit figure.

Expiry Mechanics After the 2024 SEBI Rule Change

NSE/FAOP/64506 discontinued Bank Nifty weekly options, with final weekly expiry 13 November 2024. Current specifications, checked 16 October 2026, retain monthly and quarterly options.

Bank Nifty expiry is the last Tuesday of the expiry period, with the previous trading day used for a trading holiday. Index contracts are cash settled; read the contract and clearing rules for the applicable final settlement process.

• Bank Nifty weekly options are discontinued.
• Monthly and quarterly options remain available under the current specification.
• Check the actual contract date for holiday adjustment.
• Index settlement is in cash rather than delivery of banking shares.

Bank Nifty expiry dates for November and December 2026

The standing rule is the last Tuesday of the month, moved to the previous trading day if that Tuesday is a holiday. The last Tuesday of November 2026 is 24 November. It is on the 2026 NSE holiday list used by this site, so the monthly expiry moves to the previous trading day, Monday 23 November 2026. The last Tuesday of December 2026 is 29 December, which is not a holiday on the list, so the expiry stays on that day.

Keep the rule and the date separate in your notes. The rule does not change when a holiday moves one expiry. Check NSE's circulars before trading the expiry week. The lot size and expiry calendar lists current dates, and weekly vs monthly expiry explains why weekly Bank Nifty contracts are gone. Quarterly contracts follow the same weekday rule.

A Bank Nifty Options Example with Strikes and Premiums

Illustrative monthly call: assume strike 56,000, premium ₹600 and total quantity 30 units. Premium paid is ₹18,000 plus costs. The standalone call can lose that premium; its example quantity is not a current lot quotation.

Gross expiry breakeven is 56,600. At an assumed final settlement of 57,000, intrinsic value is 1,000 per unit and settlement value ₹30,000. Gross profit is ₹12,000 before costs. At or below strike, the option expires worthless. Exercise STT uses intrinsic value; it is not a sale-premium charge.

Trade and Tax Records

Keep futures transactions, option premiums, settlements and charges as separate records. An index level, premium receipt or gross gain does not by itself establish taxable profit.

A qualified chartered accountant can assess classification, deductions and any loss or audit rules for the relevant period. No personal tax calculation is made here.

• Keep contract notes and broker statements.
• Record actual quantity and expiry.
• Separate transaction taxes from income tax.

Bank Nifty and Nifty 50

Bank Nifty is focused on banks; Nifty 50 spans the broader equity market. Their derivative quantities and expiry availability must be checked independently. Sector concentration does not establish which index will be more volatile over a particular period.

Use actual contract units rather than copying the quantity from another index. For options, underlying movement and premium movement are different inputs.

Other bank-related indices

Bank Nifty is not the only index of banks. NSE Indices also publishes separate indices for private banks and PSU (government-owned) banks, and a broader financial services index. They hold different companies in different weights. If you want exposure to one group, read the right factsheet first. See Nifty Private Bank, Nifty PSU Bank and Nifty Financial Services.

What Moves Bank Nifty

RBI policy can affect banks’ funding, loans and deposits. Its net market effect depends on expectations and other conditions; no single largest driver or fixed point response is established here.

Earnings, asset quality, credit growth and broader market news can also affect bank shares. Their effects on the index depend on constituent weights and the market reaction.

• Monetary policy and funding conditions.
• Bank earnings and asset quality.
• Credit growth and provisions.
• Broader market and policy developments.

Risk Management and Common Mistakes

Do not size a futures position from margin alone. Review notional exposure, actual quantity, possible price gaps and the need for additional funds.

A manual trading journal can record entry, exit, reason and emotions for later review. It cannot prevent an order, ensure a stop fill or establish that a particular method is profitable.

• Review position quantity and adverse scenarios.
• Treat a planned stop as an order instruction, not a guaranteed loss cap.
• Account for premium expiry and settlement.
• Review actual results after charges.

Related reading: expiry cycles, option premium and Bank Nifty scalping mechanics.

Journaling Bank Nifty trades

OneTradeJournal is a manual journal, so you enter each trade yourself. For Bank Nifty, the useful fields are the contract (future or option, strike, expiry), the real lot quantity, the entry and exit you got, the stop and target you planned, and the emotion at entry. The app estimates charges per trade, which you can check against your contract note. It does not provide prices or alerts.

• Tag expiry-week trades with the strategy name so you can compare them later.
• Write whether a policy event was due on the day.
• Record plan deviations, such as moving a stop, as a mistake and read them first in review.

After a few weeks, the reports show win rate, profit factor and drawdown, with time analysis for the hours you trade. Read the guides on a Bank Nifty trading journal and how to trade Bank Nifty options for more.

Sources

• NSE Indices: Nifty Bank index references (checked 16 Oct 2026)
• NSE: Bank Nifty specification (checked 16 Oct 2026)
• NSE: Final weekly expiries (checked 16 Oct 2026)
• NSE: Futures STT change (checked 16 Oct 2026)
• Zerodha: Exercise STT base (checked 16 Oct 2026)